Hybrid tea rose plant &#39;Korolesola&#39;

ABSTRACT

A new and distinct variety of Hybrid tea rose plant which have attractive creme-pink colored flowers and attractive dark green and glossy foliage. The buds are large and well turbinated. This new variety is having high production of long stems with a long vase life, vigorous, upright growth, and good tolerance to powdery mildew. The variety successfully propagates from softwood cuttings and is well suitable for year round production of cut flowers in commercial glass houses as a flowering cut rose. This and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

BACKGROUND OF THE INVENTION

[0001] The present invention constitutes a new and distinct variety ofhybrid tea rose plant, which was developed by artificially pollinatingan unnamed seedling(not patent in the US) with an unnamed seedling (notpatent in the US). The two parents were crossed in the summer of 1998and the resulting seed was sown in December 1998, in a controlledglasshouse environment. Out of these seedlings one seedling wasselected, as the new variety and named ‘KORolesola’.The new rose may bedistinguished from its seed parent, an unnamed seedling, by thefollowing combination of characteristics:

[0002] 1. The unnamed seedlings has a breeding background in unnamedseedlings.

[0003] 2. ‘KORolesola’ has big double flowers, while the unnamedseedling has big single flowers.

[0004] 3. ‘KORolesola’ has thick creme-pink colored petals, while theunnamed seedling has dark orange-red petals.

[0005] The new variety may distinguished from its pollen parent, anunnamed seedling created by the same inventor, by the followingcombination of characteristics:

[0006] 1. The unnamed seedling has a breeding background in unnamedseedlings.

[0007] 2. ‘KORolesola’ has bigger flowers and foliage as compared to theunnamed seedling.

[0008] 3. ‘KORolesola’ has creme-pink colored petals, while the unnamedseedling has creme colored petals.

BRIEF SUMMARY OF THE INVENTION

[0009] Initial asexual reproduction of ‘KORolesola’ by cuttings wasfirst done in Klein Offenseth-Sparrieshoop, Germany.The reproduction wasconducted in controlled greenhouse environments.

[0010] Have here proven to be stabile by propagation with cuttings inseveral generations.

[0011] ‘KORolesola’ is a high productive hybrid tea rose with a vaselifegreater than 14 days.

[0012] ‘KORolesola’ under conventional greenhouse production (18 degreeCelcius nights, and 26 Celcius day's) in Germany will produce 180-260Stems per year, averaging 60 cm long.

[0013] The objective of the hybridization of this rose variety forcommercial greenhouse culture was to create a new and distinct varietywith:

[0014] 1. Uniform and abundant flowers with good vaselife.

[0015] 2. Attractive long lasting foliage and strong growth.

[0016] 3. Year round flowering under glasshouse conditions.

[0017] 4. Suitability for production from softwood cuttings.

[0018] 5. Durable flowers and foliage which make the variety suitablefor distribution in the floral industry.

[0019] This combination of qualities was not present in previouslyavailable commercial cultivars of this type and distinguish ‘KORolesola’from all other varieties of which we are aware.

[0020] The seeds from hybridization were planted in a controlledenvironment and evaluations were conducted on the resulting plants.‘KORolesola’ was selected by Wilhelm Kordes in their development programin Klein Offenseth-Sparrieshoop, Germany.

BRIEF DESCRIPTIONS OF THE DRAWINGS

[0021] The accompanying color illustrations show as true as isreasonably to obtain in color photographs of this type, the typicalcharacteristics of the buds, flowers, leaves, stems of ‘KORolesola’.Specifically illustrated in:

Photo sheet # 1:

[0022] Young shoot.

[0023]FIG. 1. Bud before opening the sepals.

[0024]FIG. 2. Bud at the opening the sepals.

[0025]FIG. 3. Bud at the opening the petals.

[0026]FIG. 4. Flower during course of opening.

[0027]FIG. 5. Open flower—plan view.

Photo sheet #2:

[0028]FIG. 6. Open flower—plan view—obverse

[0029]FIG. 7. Open flower—plan view—reverse.

[0030]FIG. 8. Fully open flower—plan view—obverse.

[0031]FIG. 9. Fully open flower—plan view—reverse.

Photo sheet # 3:

[0032]FIG. 10. Receptacle showing stamens and pistils.

[0033]FIG. 11. Receptacle showing pistils (stamens removed).

[0034]FIG. 12. Flower petals, detached—outer surface.

[0035]FIG. 13. Flower petals, detached—inner surface.

[0036]FIG. 14. Bare stem exhibiting thorns and flower attachment.

Photo sheet # 4

[0037]FIG. 17. Five leaflets upper side.

[0038]FIG. 18. Five leaflets reverse side.

Photo sheet # 5

[0039]FIG. 15. Three leaflets upper side.

[0040]FIG. 16. Three leaflets reverse side.

DETAILED BOTANICAL DESCRIPTION OF THE VARIETY

[0041] The following is a detailed description of the Hybrid Tea Rose:Rosa hybrid ‘KORolesola’.

[0042] The following observations, measurements, values and comparisonsdescribe plants grown in glass houses in Klein Offenseth-Sparrieshoop,Germany.

[0043] The age of the observed plants where 11 to 13 months afterpropagation by cuttings, and produced as flowering cut-rose plants.

[0044] Color references are made using The Royal Horticultural Society(London, England) Colour Chart, 1995, except where common terms of colorare used. For a comparison, the nearest existing rose variety is‘JACnepal’, a rose variety described and illustrated in U.S. Plant Pat.No. 11691. Chart 1 details several physical characteristics of‘KORolesola’ and ‘JACnepal’.

[0045] Chart 1: ‘KORolesola’ ‘JACnepal’

[0046] Petal color, Upper White Group 155 D Orange-White Group 159 D.

[0047] surface Edge: Red-Purple Edge: Red Group 45 D. Group 58 C.

[0048] Petal color, Reverse White Group 155 D Orange-White Group 159 D

[0049] surface Edge: Red-Purple Edge: Red Group 45 D Group 58 C

[0050] Petal count 40-45 30-35.

[0051] Parents: Unnamed seedling. Times. Unnamed seedling

CLASSIFICATION:

[0052] Botanical: Rosa hybrid

[0053] Commercial: Hybrid Tea

[0054] PLANT:

[0055] Plant growth: Very vigorous. Grows Strong upright to bushy.

[0056] Production time is for floral stems is generally 6 to 8 weeksdepending on average temperature, light level, and cultural practices.

[0057] Height: Plants which were pruned at height of 0.5 meter, producefloral stems having a length of 40 to 90 cm.

[0058] STEM:

[0059] Color. Young wood: Green Group 137 A, with intonations ofRed-Purple Group 59 A.

[0060]Olderwood.—Green Group 139 A.

[0061] Thorns.

[0062]Incidence.—Low number of thorns

[0063]Size.—7-8 mm.

[0064]Color.—Greyed-Purple Group 183 B.

[0065]Shape.—Deep concave, bending downward

[0066] Surface.

[0067]Young wood.—Smooth.

[0068]Older wood.—Smooth.

[0069] Stem diameter: 5-6 mm

[0070] Internode length: 60-70 mm

[0071] Numbers of internodes: 8-12.

[0072] PLANT FOLIAGE: Leaves arranged alternately, compound with threeto seven leaflets per leaf, generally symmetrical, abundant, and flat inaspect. Stipules at petiole base.

[0073] Quantity of leaves: 8 to 12 per lateral branch.

[0074] Leaf size. Medium 170-180 mm(l). times. 130-135 mm(w) Petioles.

[0075]Color.—Yellow-Green Group 152 A, with intonations of Greyed-RedGroup 185 A.

[0076]Margins.—entire with few thorns

[0077]Length.—20-25 mm Diameter: about 2-3 mm.

[0078] Stipules.

[0079]Size.—10-12 mm

[0080]Surface.—Smooth

[0081]Color.—Green Group 139 C

[0082]Margins.—Serrated

[0083] Rachis. Color: Yellow-Green Group 152 A,

[0084]Margins.—Margins with prickles.

[0085]Length.—20 to 25 mm.

[0086] Leaflets.

[0087]Edge.—Serrated.

[0088]Serration.—Single.

[0089]Shape.—Ovate with acute apex and obtuse base.

[0090]Texture.—Smooth.

[0091]Appearance.—Glossy.

[0092]Size.—length: 60 to 70 mm. With: 40 to 50 mm.

[0093]Color.—Young foliage: Upper surface: Red-Purple Group 59 A. Lowersurface: Red-Purple Group 59 A.

[0094]Color.—Mature foliage: Upper surface: Green Group 139 A. Lowersurface: Greyed-Green Group 191 B.

INFLORESCENSE:

[0095] Blooming habit: Recurrent

[0096] Number of flowers. Generally 1 bud per flowering stem.

[0097] Penduncle.

[0098]Color.—Green Group 143 A,

[0099]Texture.—Smooth,

[0100]Length.—70-75 mm Strength: Upright.

[0101] Receptacle. Surface: Smooth, glabrous.

[0102]Shape.—Funnel-shaped

[0103]Size.—h: 10-12 mm w: 8-10 mm.

[0104]Color.—Green Group 143 A,

[0105] Sepals.

[0106]Quantity.—5.

[0107]Shape.—Narrowly Ovate w. acute tip.

[0108]Texture.—Leathery.

[0109]Margin.—Foliaceous appendages on 2 of the five sepals.

[0110]Appearance.—Dull.

[0111]Color.—Upper surface: Green Group 138 C Reverse surface: GreenGroup 143 D.

[0112] Buds.

[0113]Size.—30-35 mm (h)20-25 mm (w)upon opening.

[0114]Shape.—Cupped.

[0115]Color.—at ¼opening, White Group 155 D.

[0116] Flower:

[0117] Duration. As a cutflower, flowers last from 12 to 16 days.

[0118]Fragrance. None.—

[0119]Size.—70-75 mm in diameter.

[0120]Form.—Shape of flower when viewed from the side. Up on opening:Cupped to pointed Open flower: Cupped

[0121]Color.—

[0122]Petals, upon opening.—Upper surface: White Group 155 D, edgecolered in Red-Purple Group 58 C Reverse surface: White Group 155 D,edge colered in Red-Purple Group 58 C.

[0123]Petals after opening.—Upper surface; White Group 155 D, edgecolered in Red-Purple Group 58 C Reverse surface: White Group 155 D,edge colered in Red-Purple Group 58 C General tonality: On Open flower:Third day: White Group 155 D, with intonation of Red-Purple Group 58 CAfterwards: White Group 155 D, with intonation of Red-Purple Group 58 C.

[0124] Petals:

[0125] Petal reflex. Outermost petals reflex backwards at opening .Fully open all petals reflex backwards.

[0126] Texture. Smooth.

[0127] Petal edge. Uniform

[0128] Petal count. Approximately 40-45 on the average per flower.

[0129] Petal size. Length 45 mm With: 50 mm.

[0130] Shape. Outer petals: Round

[0131]Inner petals.—Ovate.

[0132] Reproductive organs:

[0133] Stamen number: Approximately 80-85 on average per flower.

[0134] Pollen. Color: Yellow-Green Group 150 D,

[0135] Pollen abundance: Average.

[0136] Anthers. Size: 1-2 mm Color: Yellow-Orange Group 15 C, Shape:Oblong.

[0137] Filaments. Size: 6-7 mm Color: Yellow-Green Group 150 D.

[0138] Pistils number: Approximately 50-60 on average per flower.

[0139] Stigmas. Location: Superior in location to anthers Color: YellowGroup 11 D.

[0140] Styles. Color: Red-Purple Group 57B. Length: 3 to 4 mm.

DEVELOPMENT:

[0141] Vegetation. Dense

[0142] Blooming. Abundant.

[0143] Aptitude to bear fruit. Poor.

[0144] Resistance to diseases. Above average resistance to mildew andBotrytis under normal growing conditions in KleinOffenseth-Sparrieshoop, Germany.

[0145] Hips/seeds has not been observed due to that the plant has neverbeen grown to the stage of seed development, due to the fact, that thevariety is developed for producing floral stems only only.

[0146] Winter hardiness & Drought/heat tolerance: Due to the fact, thatthis variety is a cutrose plant, developed for producing floral stemsonly, the plant is not tested for winter hardiness or drought/heattolerance

1. A new and distinct variety of rose plant of the hybrid tea class,substantially as herein illustrated and described as a distinct andnovel rose variety due to its abundant creme-pink colored flowers,attractive long lasting foliage, vigorous and upright growth, year roundflowering under glasshouse conditions, suitability for production fromsoftwood cuttings, and durable flowers and foliage which make thevariety suitable for distribution in the floral industry: